If you notice when your leafs are at full droop, they kinda twist a bit. The leaves spread out. Most of the Chevy shackles are just formed sheet metal, maybe 1/8" thick. My daystar shackles are at least 1/4" and I have not had a single issue with them. Actually I don't think I have heard of any major failures from most of the XJ Shackles MFG's out there.